Electronic devices and low-voltage detection method

摘要

An electronic device 1 that comprises; a peripheral circuit 2 which is driven by a specific drive voltage, a battery 3 which supplies the drive voltage, a flash memory 4 which is driven by the battery 3 and a CPU 5 which writes data to the flash memory 4, after which reads the data which has been written and compares the written data with the read data, and which based on the comparison results, determines whether or not the drive voltage has dropped below the minimum operable voltage.